Valve.



R. G. MCDOWELL.

VALVE.

APPLICATION FILED 050.28. 1916.v

. 1,240,586. 1 PatentedSept. 18,1917.

Witnesses UNITED STATES PATENT oEE aoE.

ROBERT GEORGE MCDOWELL, 0F WALKERVILLE, MONTANA, ASSIGNOR OF ONE-HALE TO ALFRED WILLIAM CHARLES, OF BUTTE, MONTANA.

VALVE.

Specification of Letters Patent. Patented Sept, 18, 1917,

Application filed December 28, 1916. Serial No. 139,857.

is used on airlines in connection with rock drilling machines, in mines, in quarries and elsewhere.

The invention aims to provide a cock of thistype having an inlet and spaced outlets,

a single rotatable plug being made eificient for controlling the inlet and the outlets.

Another object of the invention is to provide novel means for holding the plug in place in the body yieldingly.

A further object of the invention is to provide novel means for assembling the operating lever with the plug.

Another object of the invention is to im-' prove the arrangement of the bores in the body portion of the cock, and the transverse passage in the rotatable plug, so that the bores and the passage will cooperate in a peculiarly efficient manner.

It is within the province of-the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in vertical section, a cock constructed in accordance with the present invention, parts appearing in elevation.

' Fig. 2 is a section taken approximately on the line 2-2 of Fig. 1;

Fig. 3 is a top plan of a cock constructed in accordance with the present invention;

Fig. 4 is a bottom plan of the cock; and

Fig. 5 is a section on the line 55 of Fig. 1, distant parts being omitted.

The cock forming the subject matter of this application includes a body 1 provided with an inlet 2 and with outlets 3. The body 1 has an axial opening 4L which tapers as it extends toward the top of the cock. In the side of the body 1, a slot 5. is formed, the

same defining, at its ends, shoulders 6 in the body portion of the cock. Threaded into the lower end of the body 1 are studs 7 The bore of the inlet is shown at 8, and the bores of the outlets are shown at 9. Adjacent their inner ends, the bores 9 are ofiset toward each other as shown at 10.

Journaled for rotation in the opening 4. of the body 1 is a tapered plug 11. The plug 11 is provided at its upper end with a polygonal stem 12. At 14 there appears an operating lever, having an eye 15, received in the slot 5. The eye 15 has a polygonal opening 16 which receives the stem 12. In practicaloperation, the eye 15 is thrust into the slot 5, and the plug 11 is pushed upwardly in the bore 4 until the stem 12 of the plugis received in the polygonal opening 16 of the eye. The lever 14 thus is held interengaged with the plug, provided that some suitable means is supplied, for preventing 4 the plug 11 from moving downwardly.

The means for preventing the plug 11 from moving downwardly includes a cap plate 17, through which the studs 7 pass. Nuts 18 are threaded onto the lower ends of the studs 7, and, if desired, spring washers 19 may be interposedbetween the cap 17 and the nuts 18. These washers 19 thrust the cap 17 and the plug 11 upwardly, so that the plug is made to fit tightly but rotatably in the tapered bore 4L of the body 1. In the lower end of the plug 11 there is fashioned a recess 20, defining a marginal flange 21 which bears on the cap 17. The recess 20 is adapted to receive a lubricant, which preferably is in the form of a stiff grease, and this grease, finding its way between the cap 17 and the flange 21, will prevent undue friction between the plug and the cap.

The plug 11 has a transverse passage therethro-ugh. One end 22 of this passage is wider than the other end 23 thereof, as clearly shown in Fig. 1. The end 22 of the passage cooperates with the bore 8 in the inlet 2, and the end 23 of the passage 1s adapted to cooperate with the bores 9 of the outlets 3. The side walls 24 of the end 22 of the passage flare or diverge as shown 1n Fig. 2, and the side walls of the end 23 of the passage flare or diverge, as shown in the said figure. The walls 25 flare enough so that, as shown in Fig. 2, air or other fluid may be delivered to both of the bores 9 at once, the outlets 3 being supplied simultaneously. By rotating the plug 11, either one of the bores 9 may be closed, the other bore remaining open. In this connection it should be observed that the angle between the walls 2% of the end 22 of the passage is suflioiently great so that when one of the bores 9 of the inlets 3 is closed, air may still be delivered from the bore 8 of the inlet 2, through the parts 22 and 23 of the passage in the plug 11, and outwardly through the bore 9 of that outlet 3 which is open. lVhen the lever is lies directly above one of the outlets 3, air or other fluid is being supplied to that outlet, and the other outlet is closed. lVhen the handle or lever l l bisects the angle defined by the outlets 3, then the plug 11 is arranged as shown in Fig. 2, and fluid is being supplied to both of the outlets 3. When, however, the lever 14 is swung around until it abuts against either of the shoulders 6, then the bore 8 of the inlet 2 is closed, and air is supplied to neither of the outlets 3.

An important and salient feature of the invention remains yet to be discussed. It has been found in practice that a device of this type will operate with a maximum elticiency and be most useful, if the angle A of Fig. 2 between the axis of the inlet 2 and the axis of the outlet 3 is 128 degrees. It has been found, further, that the efficiency of the device and its utility are promoted and enhanced if the angle between the walls 2-1 of the passage, and the angle between the walls 25 of the passage (the passage in the plug 11 being referred to) is 65 degrees. This combination of angles existing between the walls of the passage on the one hand, and the axes of the inlet 2 and the outlets 3 upon the other hand, necessitates the offsetting of the bores 9 of the outlets as shown at 10. I The above combination, comprising the bores offset at 10, the angle of 128 degrees between the axes of the parts 3 and 2, and the angle of 65 degrees between the walls; 24: and between the walls 25, results in the production of a cock which will deliver fluid better than any cock previously known to the art, and will produce, in combination with the results above mentioned, a cook the plug of which may be manipulated rapidly and positively to secure an opening and a closing. 0

Having thus described the invention, what is claimed is g A cock comprising a body provided with a tapered axial opening, and equipped withan inlet and an outlet; a tapered plug journaled in the opening and controlling the inlet and the outlet; a cap supporting the plug; studs carried by the body and projecting through the cap; nuts on the studs; and spring washers interposed between the studs and cap andcarried by the studs.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

ROBERT GEORGE MCDOWELL.

Witnesses:

D. J. EGAN, SIMON BANK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

